INSIGNIA : A QOS
ARCHITECTURAL FRAMEWORK
FOR MANETS
Course:-Software Architecture & Design
Team Members
1.Sameer Agrawal
2.Vivek Shankar Ram.R
INTRODUCTION
• MANETS – Mobile Ad hoc networks
• QOS in MANETS - a technical challenge
• INSIGNIA QOS Architectural framework –
supports delivery of adaptive services in
MANETS
• What are we going to see ?
THE ARCHITECTURE
Locally send/deliver
packets
Routing
protocol
Routing table
INSIGNIA
Signaling
Routing
updates
In-band
signaling
Mobile
Soft state
Admission
Control
Channel state
control
Packet-drop
M
A
C
Packet
forwarding
IP packets in
M
A
C
Packet
scheduling
IP packets out
CONSTITUENTS OF THE
ARCHITECTURE
• STYLE
– Abstraction of architectural components from various
specific architectures.
• COMPONENTS
– From which systems are built
• CONNECTIONS
– Between the components
• CONSTRAINTS
– On components, connections and layout.
• RATIONALE
– describe why the particular architecture is chosen
STYLE
• UNIQUE ARCHITECTURE
• FOLLOWS ABSTRACT DATA TYPE STYLE and
REPOSITORY.
COMPONENTS
• ROUTING MODULE
– Generic set of MANET routing protocols can be plugged in to the
architecture.
– Tracks changes, updates routing table and makes that visible to the
packet forwarding component.
• INSIGNIA SIGNALING
– Establishes flow restoration algorithm which respond to dynamic route
changes.
– Establishes adaptation algorithm which respond to changes in available
bandwidth.
• ADMISSION CONTROL
– Responsible for allocating bandwidth to flows based on their
minimum/maximum bandwidth.
– It is periodically refreshed after allocating resources by a soft state
mechanism through the reception of data packets
COMPONENTS (contd…)
• PACKET SCHEDULING
– Uses a weighted round robin service.
– Provides compensation in the case of location dependent conditions
between mobile nodes.
• PACKET FORWARDING
– Classifies incoming packet and forwards them to the appropriate
module.
• MEDIUM ACCESS CONTROL
– This framework is transparent to any underlying media access control
protocols.
INTERACTIONS
• ROUTING UPDATES
– The periodic updates on the routing table
• INBAND SIGNALING
– Carries control information along with the data
packets
– Flows/sessions are rapidly established
• CONTROL
– Controls the scheduling of the packets via the packet
scheduling module
INTERACTIONS (contd…)
• IP PACKETS IN
– These are the input packets to the packet
forwarding module.
• IP PACKETS OUT
– These are the output packets from the packet
scheduling module.
CONSTRAINTS
• FLOW – sequence of packets from a single source to
one or more destinations representing a single media
type. These flows require ADMISSION CONTROL,
RESOURCE RESERVATION & MAINTENANCE at all
Intermediate routers.
• PERFORMANCE relies on the speed at which the
routing protocol can re-compute new routes if no
alternative route is cached after topology changes.
• SOFT STATE relies on the fact that a source sends data
packets along an existing path.
RATIONALE
• Allows packet audio, video and real time data
applications to specify their maximum & minimum
bandwidth needs.
• Plays a central role in resource allocation, restoration
control and session adaptation between communicating
mobile hosts.
• Supports adaptive services by establishing and
maintaining reservations for continuous media flows and
micro flows.
• In-band signaling are capable of responding to the fast
time scale dynamics in MANETS.
CONCLUSION
• Highly responsive to changes in network
topology, node connectivity and end to end QOS
conditions.
• Benefits under diverse mobility, traffic, and
channel conditions.
• Use of in-band signaling and soft-state resource
management makes the architecture very
efficient, robust and scalable.
REFERENCES
• G-S. Ahn, A. T. Campbell, S-B. Lee, and X. Zhang, ``INSIGNIA: An
IP-Based Quality of Service Framework for Mobile ad Hoc
Networks”, Journal of Parallel and Distributed Computing 60,
374_406 (2000).
• ASAP Adaptive QoS Support with Reduced Reservation Overhead
in MANETs - Patrick Stuedi, Jianbo Xue, Gustavo Alonso Swiss
Federal Institute of Technology (ETHZ) Departement of Computer
Science 8092, ETHZentrum,Switzerland {stuedip, xue,
alonso}@inf.ethz.ch
• A Glance at Quality of Services in Mobile Ad-Hoc Networks
Zeinalipour-Yazti Demetrios ([email protected]) Department of
Computer Science University of California – Riverside 3201 Canyon
Crest Dr,Riverside CA 92507, USA
THANK YOU